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POPULAR SCIENCE REVIEW. 
animal and vegetable forms which have existed in past ages. 
Secondly, that, notwithstanding all that has been said, and most 
justly said, of the necessary imperfection of the geological 
record, we may hope that there is still so much preserved that 
the study of the course of events which have led up to the 
present condition of life on the globe, may have a great future 
before it . — A Lecture delivered before the Royal Institution , 
March 10, 1876. 
EXPLANATION OF PLATE CXXXVIIL 
Fig. 1. Side view of the cranium of Titanotherium ( Brontothcrium ingens , 
Marsh). 
Fig. 2. Upper view of the same, showing the size and form of the brain. 
Fig. 3. Upper view of the cranium of Uintatherium (Dinocei'as, Marsh), 
showing the size and form of the brain. 
Fig. 4. Fore foot of Uintatherium (. Binocei'as , Marsh). 
Fig. 5. Hind foot of Uintatherium ( JDinoceras , Marsh). 
(All ^ the size of nature. From Marsh’s figures.) 
